On 4/13/07, Scott Deyo put forth:
On the Electronotes it is wired as a comparator, as shown here:
http://home.att.net/~synthsource/ens76/vco2.htm
Notice that on IC-7, the 2M resistor goes from the output to the
positive/non-inverting input. That's a comparator.
On the Bridechamnber site, it is wired as an inverting amp, as shown here:
https://bridechamber.sslpowered.com/bintic%20vco%20outputs%20schematic.pdf
Notice on that the 2M resistor goes from the output to the
negative/inverting input. That's an inverting amplifier with
extremely high gain.
>I think I found the issue here.
>Maybe the 358 would be better. I just had 072s, and they've worked on
>around 10 Bintics I've built.
>Follow the Electronotes link on Ken's VCO page to get a full
>description. My mod is from there.
On the Electronotes it is wired as a comparator, as shown here:
http://home.att.net/~synthsource/ens76/vco2.htm
Notice that on IC-7, the 2M resistor goes from the output to the
positive/non-inverting input. That's a comparator.
On the Bridechamnber site, it is wired as an inverting amp, as shown here:
https://bridechamber.sslpowered.com/bintic%20vco%20outputs%20schematic.pdf
Notice on that the 2M resistor goes from the output to the
negative/inverting input. That's an inverting amplifier with
extremely high gain.